| South Houston to Collegno | 5,362.83 mi (8,630.64 km) |
| South Houston to Cologno al Serio | 5,434.21 mi (8,745.51 km) |
| South Houston to Cologno Monzese | 5,418.65 mi (8,720.48 km) |
| South Houston to Colorno | 5,485.95 mi (8,828.79 km) |
| South Houston to Comacchio | 5,569.18 mi (8,962.73 km) |
| South Houston to Comiso | 5,973.13 mi (9,612.83 km) |
| South Houston to Como | 5,400.73 mi (8,691.63 km) |
| South Houston to Concordia Sagittaria | 5,556.31 mi (8,942.02 km) |
| South Houston to Concorezzo | 5,418.88 mi (8,720.85 km) |
| South Houston to Conegliano | 5,529.46 mi (8,898.81 km) |
| South Houston to Conselice | 5,561.54 mi (8,950.44 km) |
| South Houston to Conselve | 5,536.26 mi (8,909.75 km) |
| South Houston to Conversano | 5,921.26 mi (9,529.35 km) |
| South Houston to Copertino | 5,989.40 mi (9,639.00 km) |
| South Houston to Copparo | 5,547.28 mi (8,927.48 km) |
